154534321 has 2 divisors, whose sum is σ = 154534322. Its totient is φ = 154534320.

The previous prime is 154534319. The next prime is 154534339. The reversal of 154534321 is 123435451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130416400 + 24117921 = 11420^2 + 4911^2 .

It is an emirp because it is prime and its reverse (123435451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154534321 - 2¹ = 154534319 is a prime.

Together with 154534319, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 154534321.

It is not a weakly prime, because it can be changed into another prime (154534351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77267160 + 77267161.

It is an arithmetic number, because the mean of its divisors is an integer number (77267161).

Almost surely, 2^154534321 is an apocalyptic number.

It is an amenable number.

154534321 is a deficient number, since it is larger than the sum of its proper divisors (1).

154534321 is an equidigital number, since it uses as much as digits as its factorization.

154534321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 28.

The square root of 154534321 is about 12431.1834110836. The cubic root of 154534321 is about 536.6300429379.

Adding to 154534321 its reverse (123435451), we get a palindrome (277969772).

The spelling of 154534321 in words is "one hundred fifty-four million, five hundred thirty-four thousand, three hundred twenty-one".